#include <stdio.h>
#include <stdlib.h> /* 提供malloc()原型 */
#include <string.h> /* 提供strcpy()原型 */
#define TSIZE 45 /* 储存片名的数组大小 */
struct film {
char title[TSIZE];
int rating;
struct film * next; /* 指向链表中的下一个结构 */
};
char * s_gets(char * st, int n);
int main(void)
{ 
struct film * head = NULL;
struct film * prev, *current;
char input[TSIZE];
/* 收集并储存信息 */
puts("Enter first movie title:");
while (s_gets(input, TSIZE) != NULL && input[0] != '\0')
{ 
current = (struct film *) malloc(sizeof(struct film));
if (head == NULL) /* 第1个结构 */
head = current;
else /* 后续的结构 */
prev->next = current;
current->next = NULL;
strcpy(current->title, input);
puts("Enter your rating <0-10>:");
scanf("%d", &current->rating);
while (getchar() != '\n')
continue;
puts("Enter next movie title (empty line to stop):");
prev = current;
} 
/* 显示电影列表 */
if (head == NULL)
printf("No data entered. ");
else
printf("Here is the movie list:\n");
current = head;
while (current != NULL)
{ 
printf("Movie: %s Rating: %d\n",
current->title, current->rating);
current = current->next;
} 
/* 完成任务， 释放已分配的内存 */
current = head;
while (current != NULL)
{ 
current = head;
head = current->next;
free(current);
}
printf("Bye!\n");
return 0;
} 
char * s_gets(char * st, int n)
{ 
char * ret_val;
char * find;
ret_val = fgets(st, n, stdin);
if (ret_val)
{ 
find = strchr(st, '\n'); // 查找换行符
if (find) // 如果地址不是 NULL，
*find = '\0'; // 在此处放置一个空字符
else
while (getchar() != '\n')
continue; // 处理剩余输入行
} 
return ret_val;
}